I have bought other nuts for my cars when I change rims. The coating usually lasts a season, then they become dull and the coating begins to peel off. I've had Gorilla studs on my Tundra for over a year and a half and haven't had any issues. I bought a kit for my LandCruiser and it's the same. they look like new after a few months. This last purchase was for my Saleen so it shows I trust the product. The small diameter fits my rims so when installing the lug nuts it doesn't scratch the sides of my rims. Whenever I need nuts. I know which company to go to.